Automatic nailing device for nailing-machines.



0. SATTLER. AUTOMATIG NAILING DEVICE FOR NAILING MACHINES.

APPLICATION FILED MAI 26, 1907.

901,192, Patented 0gb. 13,1908.

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UNITE s'rATES PATENT ornron AUTOMATIC NAILING DEVICE FORNAILING-IVIAGHINES.

Specification of Letters Patent.

Patented Oct. 13, 1908.

Application filed. May 25, 1907. Serial No. 375,608.

To all whom it may concern:

Be it known that I, CARL Sii'r'rnnn, a citizen of the German Empire, andresident of Steglitz, near Berlin, Germany, have in- .vented certain newand useful Improvements in Automatic Nailing Devices forNailing-Machines, of which the following is a specification.

My invention relates to an automatic nailing-device by which the nailsare driven automatically into the respective piece or article. The nailsare driven out of the device one by one and so placed that the head isin a certain position, and of the nails arranged in a row only one nailis detached at a time, which is thereupon placed before the device bywhich it is pressed into the object. This automatic nailing-device isintended to be used in machines for nailing the lcathern uppers of shoesto wooden soles, in machines for nailing boxes and the like.

The invention is illustrated on the accompanying drawing, in whichFigure 1 a vertical section of the device, and Fig. 2 a top view of thedevice, partly in section.

Like characters of reference indicate like parts throughout thedifferent figures.

The nails are thrown into a suitable receptacle 1, fastened to thecasing 2. ,In the receptacle 1 a slide 3 moves up and down, which has atits upper end a slot, into which drop the nails with their shanks andslide down on the inclined side-walls of the receptacle towards theslide. The nails remain hung up in the slot of said slide by theirheads. The slide has an inclined upper edge from which, when the slideis in its highest position, the nails are moved upon a slide-way and bymeans of a suitable device, indicated at 10, are taken off one by oneand dropped into a chute 12 in the position of the parts shown in Fig. 1and carried to the shoe by the motion of the tube 19 and are driven fromthis tube by the hammer 24. The slide 3 for receiving the nails isoperated by a lever 13, which is actuated by the driving shaft 14 of thede vice for pressing in the nails in such a manner that, when the slideis moved up and down, the device for taking the nails off is operated atthe same time.

The device, by which the nails are pressed or driven into the objectsconsists of a casing 2, in which slides a tube 19, which carries theguide for the nail and the hammer. In the tube 19 is arranged a cam disk20, in a slot a flat piece 25, sliding loosely in the body 19. The camdisk is fixed on the shaft 14 in the center of the casing 2, and theshaft is rotated by a pair of wheels 23, so that, when the shaft isrotated, the tube 19 is shifted axially and parallel to the shaftforwards and backwards by the cam disk 20. This forward and backwardmovement of the tube 19 is so divided that it only takes place duringone half of the revolution of the shaft 14, so that during the stoppageof the tube 19, the hammer 24 has time, to press the nail into theobject. The flat piece 25 slides in a groove 26 of the casing 2. A pin27 is screwed into the flat piece 25 and the pin is guided with itsother end in a thickened part 28 of the tube 19. The pin carries aspring 29, which forms the connecting piece between the cam disk 20, thefiat piece 25 and the tube 19. The purpose of the spring 29 is toequalize the differences in the distance from the nailer to the shoe atdifferent parts of the shoe. In order that when the flat piece 25returns, the tube 19 is also moved, there is arranged at the end of thepin 27 another pin or a headis screwed upon the end of said pin. On theshaft 14 is further arranged a second cam disk 30, in the groove 31 ofwhich slides the roller 32 so that the cam can be moved longitudinallyon shaft 14 wl1ile turning therewith. The pin or pivot of this roller 32is fixed in a cylinder 33, sliding in the tube 19, in the. front part ofwhich is fastened the hammer 24 for driving or pressing the nails. Thishammer lies in the nail guide 34. The cam disk 30 is moved forwards andbackwards by means of the pins 35 fastened to the tube 19 and engagingin a groove in cam 30, when the tube 19 is moved forwards and backwards.The active portion of cam 20 moves tube 19 downwardly and, at the sametime, cam 30, also, by reason of the engagement of pins 35 with thelatter. Because of the engagement of the cylinder 33 through roller 32with cam 30 the hammer 24 is also moved downwardly with said guide. Thetube 19 then comes to rest by reason of the entrance of roller 22 intothe non-activev part of its cam groove and at the same time, roller 32,which during the preceding motion has been engaged with the non-activepart of the cam 30, enters into its active part and moves the cylinder33 and hammer 24 further downward to .21 of which moves the roller 22,fastened to force the nail out of the nail guide. The hammer and guideare returned to their initial positions in the same way, the cam 30moving the hammer upwardly while cam moves both the nail guide and thehammer, as well as cam upwardly.

The Whole device is so journaled in the pivots 37 of the casing 2 thatitcan oscillate on these pivots, in order to nail at different heights.The height of the nail guide or the position of the whole nailing deviceis regulated by a cam disk 38.

In order that, when a nail is driven in, the tube 19 cannot be movedbackwards against the pressure of the spring 29, there is pro vided adetent at the end of the tube. This detent consists of a pin L0 radiallyonrnaled with an inclined surface, which is in contact with an equallyinclined part 41 of the nail guide. Around the pin is arranged a spring42, which tends to press the same with its inclined surface against theinclined surface of the nail guide. Around the tube 19 is placed aslotted ring 4L3, in the slot of which enters the other pointed end ofthe pin 40. If now, when a nail is driven in, a pressure is exerted onthe nail guide 3 1-, which is mounted to have a slight longitudinalmotion in tube 19, the pin is moved outwards, by which the outer end ofthe pin presses the ring 43 asunder, so that the tube is fixed in thecasing 2 by reason of the friction between the expanded ring and thecasing. The detaining ceases at once, as soon as the nail guide andhammer are withdrawn.

What I claim is 1. In an automatic nailing device for nailing machines,a shaft, a nail guide, a hammer, a cam on said shaft constructed andarranged to move the nail guide into contact with the work, a second camlongitudinally movable on said shaft and connected with the nail tube tobe moved therewith, the second cam being provided with a cam grooveconstructed and arranged to move the hammer to drive the nail after thenail. guide has come to rest, and a detent to lock the nail guideagainst backward movement during the driving of the nail.

2. In an automatic nailing device, a shall, a nail guide, a cam on saidshaft const rueted and arranged to move the guide axially of said shaft,a member, adapted to slide loosely in said guide and to be moved by saidcam, a pin connected, to said member and guided in the nail guide and aspring on said pin between the nail guide and member to provide anelastic connection between said parts.

3. In an automatic nailing device, :1 casing, a movable tubular memberin said casing, a nail guide movably mounted in said member and havingan inclined surface, a slotted expansible ring mounted in said easing,against the walls thereof, a pin slidinglv mounted in said tubularmember and having an inclined surface adapted to engage with theinclined surface of the nail guide. and having an end adapted to enterthe slot of the slotted ring, whereby, when the nail guide is pressedagainst. the worlt, the ring is expanded against the walls of the casingto lock the tubular member and the nail guide, and a spring on said pin,adapted to return the pin and nail guide to their initial positions.

In testimony whereof I have signed my name to this specification in thepresence ol two subscribing witnesses.

C ARI) SlX l l I Jpll I itnesses HENRY Hasrnn, IVOLDEMAR Haven

